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1.源码
FlashDB: 一款支持 KV 数据和时序数据的超轻量级数据库
移植指南:
开发 - 移植 - 《FlashDB v2.1 使用教程》 - 书栈网 · BookStack
2.文件结构
| 文件 | 介绍 |
|---|---|
| demos | 各种demo |
| docs | 文档 |
| inc | flashDB头文件 |
| port | fal/inc: fal抽象层的头文件 fal/porting: 各种类型flash接口读写配置 fal/src: fal的抽象层 |
| samples | kvdb tsdb例子 |
| src | flashDB源码 |
| tests | 测试 |
| zephyr | linux推出的实时系统 |
inc文件
fdb_cfg_template.h: 这个实际需要修改为fdb_cfg.h, 用于配置flashDB(一般去例程里面拿配置好的文件)
fdb_def.h: flashDB的定义
fdb_low_lvl.h: 对接底层flash的读写函数的头文件, 函数定义在: fdb_untils.c
flashdb.h: kvdb和tsdb的API函数
port文件
fal/inc
fal_def.h: fal_flash_dev_t : 用于对接flash的一些操作
struct fal_flash_dev
{char name[FAL_DEV_NAME_MAX]; //flash的名字:norflash(stm32的flash)/* flash device start address and len */uint32_t addr; //flash操作的起始地址(stm32 norflash的起始地址0x0800000), spiflash为 0x00size_t len; //整个flash的大小: stm32内部flash整个大小, spiflash: 整个flash的大小/* the block size in the flash for erase minimum granularity */size_t blk_size; //擦除块/扇区大小: stm32各个系列不同struct{int (*init)(void);int (*read)(long offset, uint8_t *buf, size_t size);int (*write)(long offset, const uint8_t *buf, size_t size);int (*erase)(long offset, size_t size);} ops; //对接flash的操作函数/* write minimum granularity, unit: bit. 1(nor flash)/ 8(stm32f2/f4)/ 32(stm32f1)/ 64(stm32l4)0 will not take effect. */size_t write_gran; //写的最小字节, stm32f2/f4为一个字节, f1四个字节
};定义fal分区
struct fal_partition
{uint32_t magic_word; //魔术字: 固定为 FAL_PART_MAGIC_WORD/* partition name */char name[FAL_DEV_NAME_MAX]; // 定义的分区名/* flash device name for partition */char flash_name[FAL_DEV_NAME_MAX]; // flash名字(struct fal_flash_dev中定义的名字)/* partition offset address on flash device */long offset; //分区名的起始地址size_t len; //分区的长度uint32_t reserved; //保留
};{ \{FAL_PART_MAGIC_WORD, "fdb_kvdb1", NOR_FLASH_DEV_NAME, 0, 16*1024, 0}, \{FAL_PART_MAGIC_WORD, "fdb_tsdb1", NOR_FLASH_DEV_NAME, 16*1024 , 16*1024, 0}, \
}fal.h: flash抽象层读写,擦除一些函数声明
fal/porting
fal_cfg.h: 定义flash设备表,以及flashDB的分区表
/* flash device table */
#define FAL_FLASH_DEV_TABLE \
{ \&stm32f2_onchip_flash, \&nor_flash0, \
}/* ====================== Partition Configuration ========================== */
#define FAL_PART_TABLE \
{ \{FAL_PART_MAGIC_WORD, "bl", "stm32_onchip", 0, 64*1024, 0}, \{FAL_PART_MAGIC_WORD, "app", "stm32_onchip", 64*1024, 704*1024, 0}, \{FAL_PART_MAGIC_WORD, "easyflash", NOR_FLASH_DEV_NAME, 0, 1024*1024, 0}, \{FAL_PART_MAGIC_WORD, "download", NOR_FLASH_DEV_NAME, 1024*1024, 1024*1024, 0}, \
}fal_flash_sfud_port.c: 这个是对接spiflash的, 这个需要SFUD库
fal_flash_stm32f1_port.c: 定义和f1内部flash相关的读写配置, 以及flash设备定义
fal_flash_stm32f2_port.c
fal_flash_stm32f4_port.c
fal_flash_stm32l4_port.c
fal/src
fal_flash.c:
fal_flash_init: 对接ops操作函数
fal_flash_device_find: 通过名字查找flash设备fal_partition.c
static const struct fal_partition partition_table_def[] = FAL_PART_TABLE; //定义分区表
static const struct fal_partition *partition_table = NULL; //这个在初始化事会指向partition_table_def// 保存flash设备的名字,操作函数ops,配置信息
static struct part_flash_info part_flash_cache[sizeof(partition_table_def) / sizeof(partition_table_def[0])] = { 0 };fal_show_part_table: 显示分区信息
check_and_update_part_cache: 检查更新分区, part_flash_cache也就是更新这个数组
fal_partition_init: 分区初始化
fal_partition_find: 通过分区名查找分区表
flash_device_find_by_part: 通过分区查找flash设备
fal_get_partition_table: 获取首个分区, 以及分区数量
fal_set_partition_table_temp: 此设置将临时修改分区表，重启后该设置将丢失
fal_partition_read: 对某个分区读
fal_partition_write: 对某个分区写
fal_partition_erase: 对某个分区擦除
fal_partition_erase_all: 擦除整个分区fal_rtt.c
这个和rt-thread对块设备读写函数, 可以忽视,除非使用rt-thread的驱动
fal.c
fal_init: 初始化flash设备,以及分区表初始化
fal_init_check: 检查是否初始化成功
src
fdb_file.c: 这个对接的是与文件操作相关
fdb_kvdb.c: kvdb相关的操作
fdb_tsdb.c: tsdb相关操作
fdb_utils.c: flashDB抽象层的读写函数
fdb.c: flashDB初始化
移植
1. 在工程目录下新增flashDB目录
2. 将源码下的inc和src复制到flashDB目录, 将fdb_cfg_template.h删除, 找到demos中fdb_cfg.h的这个文件替换
3. 新建一个port文件夹, 将源码目录下的port/fal的inc和src复制到port文件夹下, 将demos中对应的fal_cfg.h复制到目录下
这个文件很重要, 用于配置flashDB的分区
/** Copyright (c) 2020, Armink, <armink.ztl@gmail.com>** SPDX-License-Identifier: Apache-2.0*/#ifndef _FAL_CFG_H_
#define _FAL_CFG_H_#define FAL_DEBUG 1
#define FAL_PART_HAS_TABLE_CFG/* ===================== Flash device Configuration ========================= */
extern const struct fal_flash_dev stm32_onchip_flash;/* flash device table */
#define FAL_FLASH_DEV_TABLE \
{ \&stm32_onchip_flash, \
}/* ====================== Partition Configuration ========================== */
#ifdef FAL_PART_HAS_TABLE_CFG
/* partition table */
#define FAL_PART_TABLE \
{ \{FAL_PART_MAGIC_WORD, "fdb_tsdb1", "stm32_onchip", 256*1024, 256*1024, 0}, \{FAL_PART_MAGIC_WORD, "fdb_kvdb1", "stm32_onchip", 512*1024, 256*1024, 0}, \
}
#endif /* FAL_PART_HAS_TABLE_CFG */#endif /* _FAL_CFG_H_ */
4.我用的是stm32f4, 就将fal_flash_stm32f4.c复制进来(如何是spiflash, 将fal_flash_sfud_port.c复制进来,同时移植SFUD库来驱动spiflash)
配置打印
-
默认情况下, 整个库是通过printf来打印的, 因此需要实现int fputc(int ch, FILE *f), 在.裸机和freertos中都是printf打印.
void print_char(char ch)
{rt_kprintf("%c",ch);
}
int fputc(int ch, FILE *f)
{if (ch == '\n') {print_char('\r');}print_char(ch);return ch;
}2. 我这里用的是rt-thread, 因此只需要开启fal_def.h中的关于rtthread的配置
#define __RTTHREAD__#ifdef __RTTHREAD__ /* for RT-Thread platform */
#include <rtthread.h>
#define FAL_PRINTF rt_kprintf
#define FAL_MALLOC rt_malloc
#define FAL_CALLOC rt_calloc
#define FAL_REALLOC rt_realloc
#define FAL_FREE rt_free
#endif如何使用可以看port/fal/samples下的四个例程
kvdb_basic_sample.c: 用于设置和获取初始化配置的kv
kvdb_type_blob_sample.c: blob对象的kv的设置与读取
kvdb_type_string_sample.c: string对象的kv设置与读取
tsdb_sample.c: 时间的kv
#include "stm32f4xx_hal.h"
#include "LED/led.h"
#include "board.h"
#include "rtthread.h"
#include "usart/usart.h"#include <flashdb.h>void SystemClock_Config(void);
static void Error_Handler(void);//void print_char(char ch)
//{
// rt_kprintf("%c",ch);
//}
//int fputc(int ch, FILE *f)
//{
//
// if (ch == '\n') {
// print_char('\r');
// }// print_char(ch);// return ch;
//}
int boot_count = 0;
int boot_time = 0;
static struct fdb_default_kv_node default_kv_table[] = {{"username", "armink", 0}, /* string KV */{"password", "123456", 0}, /* string KV */{"boot_count", &boot_count, sizeof(boot_count)}, /* int type KV */{"boot_time", &boot_time, sizeof(boot_time)}, /* int array type KV */
};/* KVDB object */
static struct fdb_kvdb kvdb = { 0 };
/* TSDB object */
struct fdb_tsdb tsdb = { 0 };static void lock(fdb_db_t db)
{__disable_irq();
}static void unlock(fdb_db_t db)
{__enable_irq();
}
static int counts = 0;
static fdb_time_t get_time(void)
{/* Using the counts instead of timestamp.* Please change this function to return RTC time.*/return ++counts;
}int main(void)
{HAL_Init();/* Configure the system clock to 168 MHz */SystemClock_Config();MX_GPIO_Init();fdb_err_t result;struct fdb_default_kv default_kv;default_kv.kvs = default_kv_table;default_kv.num = sizeof(default_kv_table) / sizeof(default_kv_table[0]);/* set the lock and unlock function if you want */fdb_kvdb_control(&kvdb, FDB_KVDB_CTRL_SET_LOCK, (void *)lock);fdb_kvdb_control(&kvdb, FDB_KVDB_CTRL_SET_UNLOCK, (void *)unlock);result = fdb_kvdb_init(&kvdb, "env", "fdb_kvdb1", &default_kv, NULL);if (result != FDB_NO_ERR) {return -1;}while (1){rt_thread_delay(1000);}
}void SystemClock_Config(void)
{RCC_ClkInitTypeDef RCC_ClkInitStruct;RCC_OscInitTypeDef RCC_OscInitStruct;/* Enable Power Control clock */__HAL_RCC_PWR_CLK_ENABLE();/* The voltage scaling allows optimizing the power consumption when the device is clocked below the maximum system frequency, to update the voltage scaling value regarding system frequency refer to product datasheet. */__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/* Enable HSE Oscillator and activate PLL with HSE as source */RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = 8;RCC_OscInitStruct.PLL.PLLN = 336;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = 7;if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){/* Initialization Error */Error_Handler();}/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK){/* Initialization Error */Error_Handler();}/* STM32F405x/407x/415x/417x Revision Z and upper devices: prefetch is supported */if (HAL_GetREVID() >= 0x1001){/* Enable the Flash prefetch */__HAL_FLASH_PREFETCH_BUFFER_ENABLE();}
}static void Error_Handler(void)
{/* User may add here some code to deal with this error */while(1){}
}
